Boiler cleaner



.Faim l2, '31932. 4 W lp -Ti-:OMAS 1,840,544

BOILER CLEANER Filed July 2, 1923 2 Sheets-Sheefl l M 5. 2 y m t e oo m S l s. .Tv e e h S 2 w SROJ AE1 Mm, cm2 HCW. TRu P w J I w Ol w B 1 F 31m: e1 UFO L @Routage Patented Jan. 12, 19Il24 l" UNITI-:D sTATEsrATENT OFFICE i s i v WILLIS P. THOMAS, OF DETROIT, MICHIGAN, ASSIGNOR TO DIAMOND POWER SPECIALTY CORPORATION, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN BOILER CLEANER Application filed July 2, 1923: Serial No. 649,140.

'T his invention relates to boiler cleaners and particularly relates to devices for loosening slag deposits from the arts of boilers.

It is the object of the mvention to effect '1 the sudden cooling and contraction of slag deposits upon the tubes or other parts of a boiler preferably by a cooling dischargeof water upon such deposits, such contraction having the effect of loosening the slag completely from the boiler parts or effecting a suiiicient loosening to permit a subsequent ready removal thereof by steam jets.

In the drawings 7 Figure 1 is a view in side elevation of a.

tubular boiler equipped with the improvedl cleaner; v

Figure 2 is a sectional view on line 2-2 of Figure 1, showing the slag removing means engaged with the lowermost row of tubes;

Figure 3 is a cross section on line 3-3 of Figure 2;

Figure '4 is a. section on line 4 4 of Figure 2;

In these views, the reference character 1 f designates a bank of boiler tubes, 2' designates the boiler wall and 2 is the fire box of the furnace, the hot gases from which flow primarily beneath said bank of tubes in the Because ofthe relatively close proximity lof the lowermost `row 1n of' the tubes to the flames and hot gases, accumulation of slag upon' the tubes l is relatively rapid as compared to the remaining tubes of the bank. This accumulation, unless removed at proper intervals, will within a comparatively short period of time completely block the space between adjacent tubes of the row interfering with circulation of the gases 'and subjecting said tubes to a continuous high temperature that is detri-` mental. As a remedy for this defect, the invention mounts upon each of the tubes 1 a fiattened fluid pipe 3 having cylindricallyconvex under-faces to conform to the curvaf ture of the engaged tubes.- Each of said pipes is of a width to project -laterally somewhat beyond the seat forming surfacepf the supporting boiler tube and a row of fluid outletsv3a opens downwardly in each of said prof jecting portions. Thus fluid, such as water ,cooling and resultantcontraction of discharging from the pipes 3 is adapted to fiow dovn the sides of the boiler tubes lto the underfaces of said tubes exercising a cooling effect upon any slag deposits that may adhere to said surface. The pipes 3 are suppliedwith slag removing fluid, such as water from a header 4 which has connections to-corresponding ends of said pipes, each ofl said connections comprising aligned nipples 5 welded respectively to the header 4 and respective plpe 3 and connected by a coupling 6. 7 designates a water or like fiuid supply pipe leading from any suitable source to the close adjacent so that the-surface of the tubes 1a upon which the slag collects will be subjected to a cooling water flow. The sudden any slag deposits upon the tubes 1a resulting from this flow of -water loosens said deposits to such an extentA that they will either at once drop from the tubesu or may be readily blown from the tubes by a subsequent discharge of steam. This subsequent discharge may be eilectedeither `by supplying steam to the pipes `3 after cutting ofi' the Water supply thereto or may result from an operation of ordinary blowerv units, one of Which is indicated at 9. For holdingleach pipe 3 firmly in engagement with the corresponding ltube lal it is preferred to insert wedges 10 between the pipes 3 and the overlying boiler tubes 1. Wherever the term gas is used in the specification and claims, this word is to be construed as covering any gaseous fluid such as steam, air, and the like. l

. What I claim`as my invention is 1. The method of removing slag deposits from a boiler part located with res ect to the combustion chamber so as to be sujected to the accumulation of slag consisting in introducing a cooling liquid in contact with the slag.

2. The method off, removing slag deposits from a boiler part located adjacent the combustion chamber so as to be subjected to the accumulation of slag consisting in introducing Water in contact With the slag While the slag is relatively hot from operation of the boiler. f-

3. The method of removing slag from a boiler part which consists in initially introducing a cooling liquid into contact with the slag to contract'the slag and loosen the same and subsequently introducing -a gas under pressure into contact With the loosened slag to blow the same from the boiler part.

4. The method of removing slag from a boiler part which consists in initially discharging Water into contact with the slag to contract the slag and loosen the same and subsequently discharging steam under pressure into contact With the loosened slag tobloW the same from the boiler art.

In testimony whereof affix In signature.

WILLIS P. T OMAS. 

